It can hear what my brain thinks!

http://trunks.secondfoundation.org/files/psychic.swf

When you add the digits of any two digit number, then subtract that total from the original number, you get 9 or a multiple thereof. Use that knowledge to place a page full of numbers, each one that is divisible by 9 next to the same symbol and you have the basis for a psychic computer. :D

Shhhh....